.container{
    position: relative;
    font-size: .16rem;
}

@mixin flex{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
a{
    text-decoration: none;
}
header{
    height: .5rem;
    background: blue;
    flex-shrink: 0;
}
main{
    flex: 1;
    background: yellow;
    overflow-y: scroll;
    div{
        margin: .5rem auto;
        height: 1rem;
        width: 80%;
        background:white;
        margin-top: .1rem;
        border: .05rem solid orange;
        border-radius: .5rem;
    }
}
.float_bottom{
    width: 1.5rem;
    height: .6rem;
    background: red;
    flex-shrink: 0;
    position: absolute;
    border-radius: 1rem;
    bottom: .6rem;
    left: 1.12rem;
    text-align: center;
    line-height: .6rem;
    color: white;
    font-size: .2rem;
    border: .02rem solid rgb(196, 0, 0);
}
.float_right{
    width: .5rem;
    height: .5rem;
    background: pink;
    flex-shrink: 0;
    position: absolute;
    border-radius: 100%;
    right: .1rem;
    top: 2rem;
    text-align: center;
    line-height: .5rem;
    color: white;
    font-size: .2rem;
    border: .02rem solid rgb(255, 149, 167);
}

footer{
    flex-shrink: 0;
    height: .5rem;
    background: blue;
}